I have never owned a gun in the price bracket of a Purdey. In fact have only had the opportunity to handle a Purdey but one time & that in a shop so didn't get to shoot it. It was a heavier pigeon gun chambered for 2 3/4" shells. I did try opening & closing it to check it out & was absolutely amazed at just how easily & smoothly it Closed. I had heard for years about how Hard these guns were to close.
I still don't understand how ejectors can have any influence on making a gun open easier "After" it is fired. The ejector mechanism would normally be held in its cocked position after firing & exert no influence to opening. I think on any double I own when it is un-fired the barrels will drop by themselves when unlatched.